The Geological Disasters And Tidal Dynamic Geomorphology Of Nanpu Area In The East Of Bohai Bay

Study area is located at Nanpu inshore waters adjacent to the east of Caofeidian, It is a beach area and a major oil Nanpu oilfield areas, but also artificial island Nanpu oil production platform construction and the main distribution area (Figure 1 .) Therefore, the study area the shallow strata and to analyze the stratigraphy, geological disasters in the region to understand factors of development and construction of oil field has important practical significance.In this paper, Jidong Oilfield Exploration and Development Institute of Nanpu area made a lot of shallow strata domain profiles in 2007, combined with previous work, the area of the shallow sedimentary system to study its shallow seismic sequences are divided analysis of geological factors in the disaster area to construction projects in the region to provide a scientific basis.The Dynamic Geomorphology in Bohai Bay Nanpu area is complicated. In recent years, with the development of Jidong Oilfield, Coastal waters in the Nanpu area built three large artificial islands. To study the character of Dynamic Geomorphology of the sea area will be very important for the construction of artificial islands。On the use of the measured tide level of the sea area, ocean currents, side-scan sonar, sediment sampling, etc,the author study and analysis the tidal dynamic geomorphology patterns system of the three artificial islands oilfield area ,speculated the migration characteristics of sand ridges,and the influence of Construction of artificial island projects in the region of current system.This thesis discusses the geohazards environment backgrounds from the next 6 aspects,such as hydrometeor,topography and geomorphy,deposited environment,acoustic stratigraphy,engineering geology and tectonic character etc,so as to identify the geohazards types and lay a foundation for the comprehensive evaluation. At the same time,the concepts of geohazards and geology disaster are explained and the difference is pointed. After concluding the different sorted methods of geohazards,a method which is more compatible to ocean development is brought forward. By the collected information of this area,there are several kinds of geohazards which have potential menace to seabed structures,such as tidal scour trough,shoal,buried paleo channel,shallow gas,liquefaction sand layer and soft layer. From their forming,distribution and potential menace,this thesis carefully analyzes these geohazards factors.